Identify that alga:
Web-based key to genera -12: planktonic colonies with chloroplasts-no sheath
Algal Search Sitemap and quick links |
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unbranched cyanobacteria (search5) |
branched cyanobacteria (search6) |
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attached, flat plate (search13) |
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Colonies and coenobia : Cyanobacteria (search21) |
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Unicells (under development) |
non-flagellate cells without case (under development) |
in silica case = diatoms (under development) |
flagellate cells (under development) |
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no chloroplast: |
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Planktonic colony no mucilage sheath
Not in a mucilage sheath | Click on the thumbnail for a larger image | ||
forming a flat disc, with the outer cells incised or bearing projecting horns |
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forming a spherical colony consisting of a hollow ball of cells |
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forming a spherical coenobium; the cells are linked to the centre by short, thick stalks; the outward-facing side has 1-4 spines |
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cylindrical cells linked to form a network |
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cells spindle-shaped, single or linked in groups of 2-4 (occasionally more), with long axes parallel; sometimes with apical spines |
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cells elongated spindle-shaped, often curved, in bundles of 2,4,..16, linked in centre. Single parietal chloroplast almost filling the cell: may have a mucilage sheath. |
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cells somewhat elongated, spindle-shaped or curved, solitary or in randomly arranged coenobia |
Pseudokirchneriella subcapitata (formerly Raphidocelis contorta / Selenastrum capricornutum) |
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Genera
not included: (no firm sheath) Actinastrum, Dimorphococcus, Euastropsis, Gloeotaenium, Lobocystis, Micractinium, Neglectella, Nephrochlamys, Nephrocytium, Oonephris, Pseudodictyosphaerium, Pseudoquadrigula, Pseudotetrastrum, Radiococcus, Tetrastrum, Tetrachlorella, Tetradesmus |
John Kinross